ul {
  padding:0;
  margin: 0;
}
.videoItem {
  display: inline-flex;
  width: 50%;
  vertical-align: top;
  font-size: 0;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 10px;
  box-sizing: border-box;
}
.videoItem span {
  font-size: 16px;
}

video {
  width: 100%;
}